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Chronic Lymphocytic Leukemia
(CLL)
April 10, 2016
Ayalew Tefferi, M.D. Mayo Clinic Rochester, MN, USA [email protected] Slides were borrowed from Dr. Timothy call, CLL expert Mayo Clinic, Rochester, MN: [email protected]
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Objectives
I. Diagnosis and disease overview
II. Risk stratification
III. Treatment
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Diagnosis
• considered in the presence of increased white blood cell count (WBC)
• entertained if the increased WBC is secondary to increased “lymphocytes”
• suspected if the peripheral blood smear reveals that the increased lymphocytes are morphologically “mature” appearing and fragile cells are present
• confirmed by flow cytometry
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Differential of blood lymphocytosis
• Reactive
• Infectious
• EBV, CMV, HIV, etc.
• Autoimmune
• Drug induced
• T-cell leukemia/lymphoma (CD3, CD5)
• NK-cell leukemia/lymphoma (CD16)
• B-cell leukemia/lymphoma (CD19, CD20, surface immunoglobulin light chain restriction)
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B- cell leukemia/lymphoma
• CD5+ • CLL: CD5+, CD20 (dim), CD23+ • Mantle cell lymphoma CD5+, CD20+ (bright), CD23- FISH: t(11:14) or cyclin D1
• CD5- • Marginal zone lymphoma CD5-, CD20+ (bright) • Hairy cell leukemia CD5-, CD20+ (bright), CD11c/CD22+ (bright), CD103+, TRAP+ Follicular lymphoma CD5-, CD20+ (bright), CD10+/- FISH: t(14:18)
CD5+/- Lymphoplasmacytic lymphoma (Waldenstrom’s macroglobulinemia): CD5 +/-, CD20+ IgM monoclonal protein (>2.5g/dL)
• * Flow cytometric results must be correlated with careful pathologic assessment of morphologic features
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Cell surface antigens and antibodies
Antigens: CD 5, 20, 19, 23 Antibodies: Anti CD 5, 20, 19,
23, etc.
Diagnostic (testing)
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B-CLL: Dim CD20 / CD5 & CD23 positive
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3 names for the same clonal process
CLL
SLL MBL Monoclonal
B-cell
lymphocytosis
ALC <5000/micL
Small lymphocytic
lymphoma
ALC <5000/micL
+marrow, nodes, spleen exam/CT
Chronic
lymphocytic
leukemia
ALC >5000/micL
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Overview • Affects ~ 10 people/100,000 in the U.S.
• More frequent in Whites >Blacks >Hispanics >Asians
• Average age at diagnosis is 71 years but ~25% <age 60 and 10% patients <age 50;
• Male to female ̴ 2
• Cause is still unknown? Due to specific exposures
• Vietnam veterans—Agent Orange--possible
• Radon?
• Other?
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SEER Cancer Statistics Review 1975-2011
Survival
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Prognostic factors
• Clinical stage
• Fluorescent in situ hybridization (FISH)/cytogenetics
• IGHV (Immunoglobulin heavy chain variable region) mutation analysis (unmutated is bad)
• Beta-2-microglobulin (>2x UNL is bad)
• Others
• ZAP-70 (Zeta-chain-associated protein kinase 70)
• CD38 (cluster of differentiation 38)
• Others
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Risk stratification by clinical parameters
Rai Stage
Characteristic Median Survival
0 Lymphocytosis only 150
I Lymphadenopathy 101
II Organomegaly 71
III Anemia (Hg<11) 19
IV Thrombocytopenia (<100) 19
2009*
N=2397
168
120
120
60
76
*Mayo Clinic CLL Database 2009
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Chromosome Anomalies in Chronic
Lymphocytic Leukemia
+12
+12
11q-
del(11)(q23)
6q-
del(6)(q23)
13q-
del(13)(q14)x1
17p-
del(17)(p13)
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Chromosome Analysis by FISH
* Median F/U 70 months
Dohner NEJM 343:1910
17p- 6q- 11q- +12 normal 13q-
Dewald et al, Mayo Clinic
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Copyright ©1999 American Society of Hematology. Copyright restrictions may apply.
IgVH
Hamblin et. al. Blood 1999:94;1848
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The international Prognostic Index for patients with CLL (CLL-IPI): An international meta-analysis.
Kutsch, et. al., J Clin Oncol 33, 2015 (suppl; abstr 7002)
4 2 2
1 1
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CLL-IPI
Kutsch, et. al., J Clin Oncol 33, 2015 (suppl; abstr 7002)
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• “B” symptoms • Fever, night sweats, weight loss
• Marrow failure • Anemia (Hgb <11)
• Thrombocytopenia (Platelets <100,000)
• Progressive or symptomatic node/liver/spleen growth
• Autoimmune complications • AIHA, ITP, etc.
Indications to start specific therapy
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Timeline of CLL drug approvals
Drug FDA approval
Prednisone 1955
Chlorambucil 1957
Cyclophosphamide 1959
Fludarabine 1991
Rituximab 1997—NHL
Chemoimmunotherapy (FCR/FR/PCR)
~2000-2002
Bendamustine 2008
Ofatumumab 2009
Obinutuzumab 2013
Ibrutinib 2014
Idelalisib 2014
Venetoclax ? 2016
Multiple agents in clinical trials ???
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B-cell receptor signaling
Wiestner, Journal of Clinical Oncology, Vol 30,1-3 2012
idelalisib
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Frontline CLL therapy comparisons
Regimen N OR
%
CR
%
PFS
(Months)
MDA1 FCR 300 95 72 78
CLL 102 FCR 282 97.8 40.7 53.7
CLL 102 BR 279 97.8 31.5 43.2
Woyach3 FR 104 90 47 42
Kay4 PCR 64 91 41 32.6
Goede5 Obin/ Chlor 333 78 21 26.7
Goede5 Ritux/Chlor 330 65 7 15.2
Resonate
26
Ibrutinib 136 86 4 NR@ 18
mo median
f/u
Resonate
26
Chlorambucil 133 35 2 18.9
1-Thompson, Blood, 127:3, 303; 2-Eichhorst, Blood 2014 124:19; 3-Woyach, JCO:29:10, 1349; 4-Kay, Blood, 109:2,
405; 5-Goede, NEJM 370:12, 1101; 6-Burger, NEJM, 373;25,2425
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Burger, NEJM 373:2425
Progression Free Survival
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Clinical trial: Idelalisib/Rituximab in treatment naïve older patients
• Phase 2 trial of 64 patients >/= age 65
• Rituximab weekly times 8/Idelalisib oral for minimum of 48 weeks, with option to continue. Median time on Rx 22 months
• Overall response 97%, CR 19%
• Responses despite 17p- or unmutated
• PFS @ 36 months was 83%
• 67 % increased LFT’s w/23% >/= Grade 3
• 64% diarrhea/colitis
O’Brien, Blood, 126:25, 2686
Clinical trial: Not FDA approved
frontline
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North American Intergroup Phase 3 CLL Trials
age<70 Age>65
Ibrutinib
Ibrutinib-
rituximab
Bendamustine-
rituximab
Ibrutinib-
rituximab
FCR
ECOG 1912 Alliance 041202
2:1 randomization CLOSED TO
ACCRUAL
12/27/15
Current Accrual=447
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* Purine nucleoside analogues (e.g. fludarabine, pentostatin) are discouraged in patients with active autoimmune
hemolytic anemia or ITP
CLL: Previously Untreated Meet
Criteria for Rx
Fit
Frail or Multiple
Comorbidities
Autoimmune cytopenias • With significant CLL burden
No 17p-/P53 mutation • Clinical Trial
• Chemoimmunotherapy
• FCR
• BR
• Ibrutinib
17p- or P53 mutation • Clinical Trial
• Ibrutinib
• Methylpred-rituximab
• If fit, consider refer for
prelim. transplant eval
Avoid Purine Analogues*
• Chlorambucil-obinutuz
• Anti CD20 Moab
• R-CP
• R-CD
• Steroids-rituximab
No 17p-/P53 mutation • Ibrutinib
• Chlorambucil-obinutuz
• Ofatumumab
• Methylpred-rituximab
• BR +/-
• Supportive care
Age < 65-70
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* Purine nucleoside analogues (e.g. fludarabine, pentostatin) are discouraged in patients with active autoimmune
hemolytic anemia or ITP
CLL: Previously Untreated Meet
Criteria for Rx
Fit
Frail or Multiple
Comorbidities
Autoimmune cytopenias • With significant CLL burden
No 17p-/P53 mutation • Clinical Trial
• Chemoimmunotherapy
• BR
• Chlorambucil-
obinutuzumab
• Ibrutinib
17p- or P53 mutation • Clinical Trial
• Ibrutinib
• Methylpred-rituximab
Avoid PurineAnalogues*
• Chlorambucil-
obinutuzumab
• Anti CD 20 Moab
• R-CP
• R-CD
• Steroids-rituximab
No 17p-/P53 mutation • Ibrutinib
• Chlorambucil-
Obinutuzumab
• Ofatumumab
• Methylpred-rituximab
• Supportive care
Age > 65-70
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Relapsed CLL Therapy Comparison Parameters Ibrutinib1 (3y) Idelalisib2
(2y)
Venetoclax3
(20m)
BR4 (2y)
MOA BTKi, oral PI3Ki, oral BCL-2i, oral Chemo, IV
ORR 90% 72% 80% 59%
CR 7% 0% 20% 9%
MRD- 0% 0% 5% 7%
PFS (median) > 30m (all),
17p- 25m
16m (all), 17p-
5m
25m (all), 17p-
16m
15m
Major AE Pneumonia,
HTN, A Fib,
diarrhea,
bleeding,
neutropenia
Diarrhea, fever,
pneumonia,
neutropenia,
LFT increase
Neutropenia
(45%),
diarrhea,
infection, TLS
Neutropenia,
thrombocytope
nia, anemia,
infection
RS 7% ? very few 16% ?
CLL relapse 14% 46% 19% OS: 34m,
>50%
1. Byrd, Blood, 125:16,2497; 2. Brown, Blood;123:3390; 3. Roberts, NEJM 374:4,311; 4. Fischer, JCO 2011, 29:3559
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Idelalisib and Rituximab in Relapsed Chronic Lymphocytic Leukemia
• Idelalisib + Rituximab • VS
• Placebo + Rituximab
• Overall response
• I-R 81%
• Placebo-R 13%
• PFS
• I-R Not reached@ time of publication, ~60% at 14 months
• Placebo-R 5.5 mo.
Furman, NEJM 370:11, 997
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CLL: Recurrent/Refractory
Asymptomatic Symptomatic
Observe or
Clinical Trial
17p- or P53 mutation • Clinical Trial
• Ibrutinib
• Idelalisib
• Methylpred-anti-CD20
• Alemtuzumab+/-rituximab
• If fit, refer transplant eval**
Frail • Ibrutinib
• Idelalisib
• Chlorambucil+/-obinutuz
• Chlorambucil+/-rituximab
• Ofatumumab
• Methylpred-rituximab
• Supportive care
Fit • Clinical Trial
• Ibrutinib
• Idelalisib
• CIT (FCR, PCR, BR)***
• Methylpred-rituximab
• Alemtuzumab+/-rituximab
• Ofatumumab
• Lenalidomide
• Consider transplant**
No 17p-/P53 mutation
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Symptoms-Old vs New Treatments
Traditional
Chemotherap
y
(1990’s-
present)
Antibodies-
(1997)
Newer, Targeted
Treatments-
(FDA approved
2014
1. Nausea
2. Vomiting
3. Fatigue
4. Infection
5. Low blood
counts
1. Infusion
reactions-
chills, rigors
2. Fever
3. Flu-like
symptoms
4. Some low
blood counts
1. Bruising/bleedin
g
2. Diarrhea
3. Rash
4. Fatigue
5. Muscle/joint
aches
6. Heart rhythm
changes
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Ibrutinib/ Idelalisib comparisons
Ibrutinib Idelalisib
Approval 1. CLL
2. CLL, 17p-, initial Rx
3. Mantle Cell, w 1 prior Rx
1. CLL, relapsed, in which
single agent rituximab
would be considered
2. SLL, w/ 2 prior Rx
3. Follicular NHL, w/ 2 prior
Rx
Route oral oral
Dose CLL: 420 mg qd
Mantle cell: 560 mg qd
150 mg bid
Single agent use yes no-CLL w/ rituximab
yes- follicular and SLL
CYP3A Moderate inhibitors- decrease
dose to 140 mg daily ( eg.
fluconazole, Cardizem..)
Strong inhibitors-avoid
(Vori, itra, posi, clarithro..)
Avoid strong CYP3A inhibitors
and inducers. It also is itself a
strong CYP3A inhibitor.
(midazolam)
Side effects Bruising/bleeding, diarrhea,
rash, atrial fib, myalgias
*Hold for 3-7 days before
and after surgery
LFT elevation, diarrhea, colitis,
pneumonitis